JPH07126922A - Production of splittable conjugate short fiber - Google Patents

Production of splittable conjugate short fiber

Info

Publication number
JPH07126922A
JPH07126922A JP5300909A JP30090993A JPH07126922A JP H07126922 A JPH07126922 A JP H07126922A JP 5300909 A JP5300909 A JP 5300909A JP 30090993 A JP30090993 A JP 30090993A JP H07126922 A JPH07126922 A JP H07126922A
Authority
JP
Japan
Prior art keywords
polyamide
polyester
heat treatment
fiber
short fibers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5300909A
Other languages
Japanese (ja)
Inventor
Toru Kamimura
徹 上村
Masatoshi Morita
正敏 森田
Tomoyuki Izumi
智之 和泉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Ester Co Ltd
Original Assignee
Nippon Ester Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Ester Co Ltd filed Critical Nippon Ester Co Ltd
Priority to JP5300909A priority Critical patent/JPH07126922A/en
Publication of JPH07126922A publication Critical patent/JPH07126922A/en
Pending legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Multicomponent Fibers (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

PURPOSE:To obtain the subject short fiber not splitting in the processes before being made into knitted fabrics or sheetlike products, but becoming highly splittable after subjected to splitting process, capable of producing knitted fabrics or nonwoven fabrics, etc., with excellent touch feel. CONSTITUTION:Using two components i.e., a polyamide A<=35mmol/g in the amount of terminal amino group and a polyester B (at least one of them contain 0.05-1wt.% of a polysiloxane) satisfying the following relationships (1) and (2), a conjugate filament yarn whose cross section is radially and alternately composed of a total of ten or more of the polyamide segments 1 and the polyester segments 2 is produced by melt spinning followed by drawing, heat treatment at constant length or under tension, mechanical crimping, and then, further heat treatment under relaxed state. The resultant filament yarn is cut into the objective short fibers of a specified length. The relationship (1):1500<= [A] <=3500; (2):1.0<= [A]/[B] <=1.2 {[A] and [B] are the melt viscosities (poise) of the polyamide A and polyester B, respectively, measured at 280 deg.C and at a shear rate of 1000sec<-1>}.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、織編物又はシート状に
するまでの工程では分割せず、分割処理工程によって初
めて高度に分割する、風合いに優れた織編物や不織布等
を得るための分割型複合短繊維の製造方法に関するもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention does not divide into a woven or knitted fabric or a sheet, but does not divide it for the first time in a dividing process to obtain a woven or knitted fabric or a nonwoven fabric having an excellent texture. The present invention relates to a method for producing type composite short fibers.

【0002】[0002]

【従来の技術】従来、ソフトな風合い、ドレープ性、ワ
イピング性を有する織編物や不織布を得るべく分割型繊
維の開発がなされており、例えば、ポリアミドとポリエ
ステルのような互いに相溶性のない2種類のポリマーの
複合繊維(特公昭48− 37044号、同53− 37927号、同53
− 10169号等)が提案されている。しかし、この複合繊
維は、製糸性を向上するためには、分割前の単繊維繊度
を大きくすることが有利となるが、分割後の最終単繊維
繊度を小さくするには、分割数を多くする必要があり、
ノズル等の構成が複雑となり、製糸性の向上と分割後の
単繊維繊度を小さくすることの両者を満足させることが
困難であった。
2. Description of the Related Art Conventionally, split type fibers have been developed in order to obtain woven or knitted fabrics and non-woven fabrics having a soft texture, drape and wiping property. For example, two types of incompatible fibers such as polyamide and polyester are used. Polymer composite fibers (Japanese Patent Publication No. 48-37044, No. 53-37927, No. 53
-10169, etc.) has been proposed. However, in order to improve the spinnability of the composite fiber, it is advantageous to increase the single fiber fineness before division, but to decrease the final single fiber fineness after division, increase the number of divisions. Must be,
It is difficult to satisfy both the improvement of the yarn-forming property and the reduction of the fineness of the single fiber after the division because the structure of the nozzle and the like becomes complicated.

【0003】[0003]

【発明が解決しようとする課題】本発明は、このような
ポリアミドとポリエステルとからなる分割型複合繊維の
欠点を解消し、製糸性が良好で、分割後の最終単繊維繊
度も小さく、かつ織編物又はシート状にする以前の延
伸、カーディング、紡績等の工程では分割せず、その後
のウオータージェット加工やエンボス加工等の機械的処
理によって初めて高度に分割する織編物や不織布に好適
な分割型複合短繊維の製造方法を提供しようとするもの
である。
DISCLOSURE OF THE INVENTION The present invention solves the drawbacks of the splittable conjugate fiber composed of polyamide and polyester, has good spinnability, has a small final single fiber fineness after splitting, and is woven. A division type suitable for woven and knitted fabrics and non-woven fabrics, which is not divided in the processes such as stretching, carding, and spinning before being made into a knitted or sheet form, and is highly divided for the first time by mechanical treatment such as water jet processing and embossing. An object of the present invention is to provide a method for producing a composite staple fiber.

【0004】[0004]

【課題を解決するための手段】本発明者らは、このよう
な課題を解決するために鋭意検討の結果、アミノ末端基
量の少ないポリアミドとポリエステルとを用い、少なく
とも一方の成分にポリシロキサンを含有させ、紡糸、延
伸熱処理後、機械捲縮を付与し、弛緩熱処理することに
よりこの目的が達成されることを見出し、本発明に到達
した。
Means for Solving the Problems As a result of earnest studies to solve such problems, the inventors of the present invention have used polyamide and polyester having a small amount of amino end groups and used polysiloxane as at least one component. The present invention has been accomplished by finding that this object can be achieved by containing the same, spinning and drawing heat treatment, and then applying mechanical crimping and relaxation heat treatment, and arrived at the present invention.

【0005】すなわち、本発明の要旨は次のとおりであ
る。アミノ末端基量が35mmol/g以下のポリアミドAと
ポリエステルBとからなり、少なくとも一方の成分がポ
リシロキサンを0.05〜1重量%含有し、下記式及び
を満足する2成分を用いて、ポリアミドセグメントとポ
リエステルセグメントとが、横断面において放射状に合
計10以上で交互に配列されてなる複合フィラメントを溶
融紡糸し、延伸し、定長又は緊張熱処理し、機械捲縮を
付与し、さらに弛緩熱処理した後、所定長に切断して短
繊維とすることを特徴とする分割型複合短繊維の製造方
法。 1500≦〔A〕≦3500 1.0≦〔A〕/〔B〕≦1.2 ここで、〔A〕及び〔B〕は、それぞれポリアミドA及
びポリエステルBの溶融粘度(ポイズ)で、温度 280
℃、剪断速度 1000sec-1における値を示す。
That is, the gist of the present invention is as follows. A polyamide segment comprising polyamide A and polyester B having an amino terminal group content of 35 mmol / g or less, at least one of which contains 0.05 to 1% by weight of polysiloxane, and two components satisfying the following formula and Polyester segments and melt-spun composite filaments radially arranged in a cross section in a total of 10 or more in total, stretched, subjected to constant length or tension heat treatment, mechanical crimping, and further after relaxation heat treatment, A method for producing a splittable composite short fiber, which comprises cutting to a predetermined length to obtain a short fiber. 1500 ≦ [A] ≦ 3500 1.0 ≦ [A] / [B] ≦ 1.2 where [A] and [B] are melt viscosities (poises) of polyamide A and polyester B, respectively, and temperature 280
The values are shown at ℃ and a shear rate of 1000 sec -1 .

【0006】以下、本発明について詳細に説明する。本
発明におけるポリアミドとしては、ナイロン6、ナイロ
ン66等が用いられるが、アミノ末端基量が35mmol/g
以下のものであることが必要である。アミノ末端基量が
35mmol/gを超えるものでは、オリゴマー等の作用によ
り紡糸の操業性が悪くなるので好ましくない。
The present invention will be described in detail below. Nylon 6, nylon 66, etc. are used as the polyamide in the present invention, but the amount of amino end groups is 35 mmol / g.
It must be: The amount of amino end groups is
If it exceeds 35 mmol / g, the operability of spinning is deteriorated due to the action of oligomers and the like, which is not preferable.

【0007】また、ポリエステルとしては、ポリエチレ
ンテレフタレートが好ましく用いられるが、ポリアミド
との相溶性を生じない成分であれば、少量(5モル%程
度以下)の共重合成分を含有していてもよい。このよう
な共重合成分としては、イソフタル酸等の芳香族ジカル
ボン酸、アジピン酸等の脂肪族ジカルボン酸及び1,4−
ブタンジオール等のジオール成分が挙げられる。
Polyethylene terephthalate is preferably used as the polyester, but it may contain a small amount (about 5 mol% or less) of a copolymerization component as long as it is a component that does not cause compatibility with polyamide. Examples of such copolymerization components include aromatic dicarboxylic acids such as isophthalic acid, aliphatic dicarboxylic acids such as adipic acid, and 1,4-
Examples thereof include diol components such as butanediol.

【0008】ポリアミド又はポリエステルに含有させる
ポリシロキサンの具体例としては、非反応型のジメチル
ポリシロキサン、メチルフェニルポリシロキサン、反応
型のジメチルポリシロキサンジオール、メチルフェニル
ポリシロキサンジオール、メチルハイドロジエンポリシ
ロキサン等が挙げられるが、ジメチルポリシロキサンが
好適に用いられる。
Specific examples of the polysiloxane contained in the polyamide or polyester include non-reactive dimethylpolysiloxane, methylphenylpolysiloxane, reactive dimethylpolysiloxanediol, methylphenylpolysiloxanediol, methylhydrogenpolysiloxane and the like. However, dimethylpolysiloxane is preferably used.

【0009】ポリシロキサンの含有量は、0.05〜1重量
%とすることが必要であり、好ましくは 0.1〜0.5 重量
%とするのが適当である。この量が0.05重量%未満であ
ると分割性を向上させる効果が不十分であり、1重量%
を超えると織編物又はシート状にする以前の延伸、カー
ディング、紡績等の工程で分割されたり、紡糸調子が悪
くなるので好ましくない。
The content of polysiloxane must be 0.05 to 1% by weight, preferably 0.1 to 0.5% by weight. If this amount is less than 0.05% by weight, the effect of improving the splittability is insufficient, and 1% by weight
If it exceeds the range, it is not preferable because it is divided in the processes such as stretching, carding, spinning before forming into a woven or knitted fabric or a sheet, and the spinning condition is deteriorated.

【0010】本発明におけるポリアミドAとポリエステ
ルBは、それらの溶融粘度が式及びを満足するよう
に選択することが必要である。ポリアミドの溶融粘度を
1500ポイズ未満とすると、アミノ末端基減少のための末
端基封鎖剤の添加量が多く必要となるためコストアップ
となり、しかも繊維形成能が低下し、繊維強力が低く実
用上問題となる。一方、ポリアミドの溶融粘度が3500ポ
イズ以上となると、紡糸、再溶融時に解重合が進みモノ
マーが増加し、紡糸操業性が悪化する。
The polyamide A and the polyester B in the present invention must be selected so that their melt viscosities satisfy the equations and. The melt viscosity of polyamide
If it is less than 1500 poise, a large amount of the end-group blocking agent is required to reduce the amino end groups, resulting in an increase in cost, lowering the fiber-forming ability, and low fiber strength, which is a practical problem. On the other hand, when the melt viscosity of polyamide is 3500 poise or more, depolymerization proceeds during spinning and remelting, the amount of monomers increases, and spinning operability deteriorates.

【0011】また、ポリアミドとポリエステルとの溶融
粘度の比が 1.0未満であると、ポリアミドが繊維断面の
中央部で集結して一つとなり、分割し難くなり、逆にこ
の比が 1.2を超えると、ポリアミドが繊維断面の外側に
多く露出し、紡糸調子が悪化するとともに、ポリエステ
ルが繊維断面の中央部で集結して一つとなり、分割し難
くなる。また、ポリアミドとポリエステルとの紡糸温度
での溶融粘度差を小さくすることにより、製糸性が向上
する。
When the ratio of the melt viscosity of polyamide to polyester is less than 1.0, the polyamide aggregates at the central portion of the fiber cross section into one and becomes difficult to be divided. Conversely, when the ratio exceeds 1.2. The polyamide is largely exposed to the outside of the fiber cross section, the spinning condition is deteriorated, and the polyester is aggregated in the central part of the fiber cross section to become one and difficult to be divided. Further, by reducing the difference in melt viscosity between polyamide and polyester at the spinning temperature, the spinnability is improved.

【0012】本発明においては、まず、上記のようなポ
リアミドAとポリエステルBとを用いて溶融紡糸し、ポ
リアミドセグメントとポリエステルセグメントとが、横
断面において放射状に合計10以上で交互に配列された複
合フィラメントを得る。図1は、分割型複合短繊維の一
例を示す断面図であり、セグメント数の合計が24の例を
示し、1はポリアミドセグメント、2はポリエステルセ
グメントを示している。
In the present invention, first, the polyamide A and the polyester B as described above are melt-spun, and a polyamide segment and a polyester segment are alternately arranged in a radial cross-section in a total of 10 or more. Get the filament. FIG. 1 is a cross-sectional view showing an example of a splittable conjugate short fiber, an example in which the total number of segments is 24, 1 is a polyamide segment, and 2 is a polyester segment.

【0013】紡糸速度は、 700〜1200m/分が適当であ
り、複合比は、体積比で3/7〜7/3が適当である。
A spinning speed of 700 to 1200 m / min is suitable, and a composite ratio of 3/7 to 7/3 is suitable.

【0014】本発明の方法で得られる分割型複合繊維
は、分割後の繊維の平均繊度が 0.5デニール以下、特に
0.3デニール以下となるようにすることが好ましい。分
割後の繊維の平均繊度が 0.5デニール以上になると、柔
軟性が得られず、風合いの悪いものとなる。したがっ
て、分割型複合繊維のセグメント数は、延伸倍率や後工
程のオーバーフィード率等を考慮して、分割後の平均繊
度が 0.5デニール以下になるように決められるが、複合
繊維のセグメント数は両成分の合計で10以上とすること
が必要である。セグメント数が両成分の合計で10未満の
場合、分割後の繊維の平均繊度を小さくしようとする
と、分割前の複合繊維を細くする必要があり、紡糸操業
上困難な場合がある。セグメント数が多ければ分割後の
繊度が小さくなるという利点があるが、実際には繊維製
造上の容易さから両成分の合計で10〜30のセグメント数
とすることが好ましい。
The splittable conjugate fiber obtained by the method of the present invention has an average fineness of 0.5 denier or less, especially after splitting.
It is preferably 0.3 denier or less. When the average fineness of the fibers after splitting is 0.5 denier or more, the flexibility is not obtained and the texture becomes poor. Therefore, the number of segments of the splittable conjugate fiber is determined so that the average fineness after splitting is 0.5 denier or less in consideration of the draw ratio and the overfeed rate in the post-process. It is necessary to make the total of ingredients 10 or more. If the total number of segments is less than 10 in order to reduce the average fineness of the fiber after splitting, it is necessary to make the composite fiber before splitting thin, which may be difficult in the spinning operation. If the number of segments is large, there is an advantage that the fineness after division is small, but in practice, it is preferable to set the total number of both components to 10 to 30 from the viewpoint of ease of fiber production.

【0015】本発明では、複合紡糸して得た分割型複合
繊維を延伸するが、紡糸した複合繊維を集束して8〜60
万デニールの未延伸繊維束とし、2〜4倍に延伸するこ
とが好ましい。
In the present invention, the splittable conjugate fiber obtained by the composite spinning is drawn, but the spun conjugate fiber is bundled to form 8 to 60
It is preferable to make an unstretched fiber bundle of 10,000 denier and stretch 2 to 4 times.

【0016】延伸後、ヒートドラムを用いて定長又は緊
張熱処理を施す。この緊張熱処理の温度は 110〜150 ℃
が好ましく、熱処理温度が低いと、次工程で捲縮を付与
する等、熱処理を施すと繊維束が硬くなり、後工程で複
合繊維を分割させても十分に分割しない等の問題が発生
する。また、熱処理温度が高温になると、次工程で弛緩
熱処理を行っても複合繊維が十分収縮せず、後工程で複
合繊維が十分に分割しない。定長又は緊張熱処理におい
ては、繊維束が弛緩せず、かつあまり緊張されないよう
にすることが望ましく1.05倍程度以下の緊張率となるよ
うにすることが好ましい。
After stretching, a fixed length or tension heat treatment is performed using a heat drum. The temperature of this tension heat treatment is 110-150 ℃
However, if the heat treatment temperature is low, the fiber bundle becomes hard when heat treatment is applied such as crimping in the next step, and there is a problem that the composite fiber is not sufficiently divided even if it is divided in the subsequent step. Further, when the heat treatment temperature becomes high, the composite fiber does not shrink sufficiently even if the relaxation heat treatment is performed in the next step, and the composite fiber is not sufficiently divided in the subsequent step. In the fixed length or heat treatment for tensioning, it is desirable that the fiber bundle does not relax and is not strained so much, and it is preferable that the tension factor is about 1.05 times or less.

【0017】定長又は緊張熱処理を施した後、クリンパ
ーで機械捲縮を付与する。機械捲縮を付与することによ
り、後工程でのカード通過性が良好となると共に、複合
繊維の分割が一層容易になる。
After subjecting to a constant length or tension heat treatment, mechanical crimping is applied with a crimper. By providing the mechanical crimp, the card passing property in the subsequent step becomes good, and the division of the composite fiber becomes easier.

【0018】機械捲縮を付与した後、定長又は緊張熱処
理の温度より10〜40℃高い温度で弛緩熱処理を施して複
合繊維を10%以上収縮させる。弛緩熱処理温度が低い
と、10%以上の弛緩率で弛緩熱処理を施しても複合繊維
を10%以上収縮させることができない。また、上記の範
囲より高い温度で弛緩熱処理を施すと、弛緩熱処理時に
繊維が溶融密着したり、変色するので好ましくない。複
合繊維を10%以上収縮させるには、弛緩熱処理時の弛緩
率を10〜25%にすることが好ましい。複合繊維を10%以
上収縮させるのは、互いにポリアミドとポリエステルの
収縮率の差を大きくし、後工程で複合繊維を分割しやす
くさせるためであり、10%未満の収縮では繊維が分割し
難いので好ましくない。最後に、所定長に切断して短繊
維とする。
After mechanical crimping, relaxation heat treatment is performed at a temperature 10 to 40 ° C. higher than the temperature of the constant length or tension heat treatment to shrink the composite fiber by 10% or more. If the relaxation heat treatment temperature is low, the composite fiber cannot be shrunk by 10% or more even if the relaxation heat treatment is performed at a relaxation rate of 10% or more. Further, if the relaxation heat treatment is performed at a temperature higher than the above range, the fibers are melt-adhered or discolored during the relaxation heat treatment, which is not preferable. In order to shrink the composite fiber by 10% or more, the relaxation rate during the relaxation heat treatment is preferably 10 to 25%. The reason why the composite fiber is shrunk by 10% or more is to increase the difference in shrinkage rate between the polyamide and the polyester to facilitate the splitting of the composite fiber in a later step. If the shrinkage is less than 10%, the fiber is difficult to split. Not preferable. Finally, cut into a predetermined length to obtain short fibers.

【0019】次に、本発明の方法で得られる分割型複合
短繊維を不織布にして極細繊維に分割する場合について
説明する。まず、複合短繊維をカード工程で開繊し、ウ
エブを形成する。柔軟性の高い布帛を得るためには、ウ
エブの目付けを40〜100 g/m2の範囲とすることが好ま
しい。カード工程においてウエブを形成させた後、物理
的な処理を施して複合短繊維を分割させ、平均繊度が
0.5デニール以下の極細繊維とする。複合短繊維の分割
を行う物理的な処理としては、ニードルパンチを施す方
法や高圧液体流を噴射する方法(スパンレース法)があ
るが、繊維を割繊性よく分割させるためには、高圧液体
流をウエブ表面に噴射して、複合短繊維を分割させる方
法が好ましく、液体流として使用する液体は、取扱いの
容易な水又は温水が好ましい。なお、この水流の圧力を
適宜選択することにより、分割の程度を制御することが
可能であり、必要に応じて一部又は全部を分割し得る。
Next, the case where the splittable conjugate short fiber obtained by the method of the present invention is made into a non-woven fabric and split into ultrafine fibers will be described. First, the composite short fibers are opened in a carding process to form a web. In order to obtain a highly flexible fabric, it is preferable that the basis weight of the web is in the range of 40 to 100 g / m 2 . After the web is formed in the card process, physical treatment is applied to split the composite short fibers, and the average fineness is
Fine fibers of 0.5 denier or less. As a physical treatment for dividing the composite short fibers, there are a method of applying a needle punch and a method of injecting a high-pressure liquid flow (spunlace method), but in order to divide the fiber with good splitting property, a high-pressure liquid is used. A method of spraying a stream onto the surface of the web to split the composite short fibers is preferable, and the liquid used as the liquid stream is preferably water or warm water which is easy to handle. The degree of division can be controlled by appropriately selecting the pressure of the water stream, and part or all of the division can be performed as necessary.

【0020】[0020]

【作用】本発明によると、アルカリ水溶液や有機溶媒等
で分割処理を施す必要がなく、風合い、ドレープ性及び
ワイピィング性が非常に良好な織編物や不織布等を与え
る分割型複合繊維が得られるが、その理由は次のとおり
である。少なくとも一方の成分にポリシロキサンを添加
することにより、ポリエステルとポリアミドの間にポリ
シロキサンの薄膜が形成され、割繊性が向上し、簡単な
水流処理等で割繊することができる。また、ポリアミド
のアミノ末端基を35mmol/g以下にすることにより、紡
糸時のモノマー発生量が減少し、紡糸操業性が向上す
る。さらに、ポリアミドとポリエステルの溶融粘度が式
及びを満足するようにすることにより、各ポリマー
の中央での集結や操業調子の悪化を防ぎ、均一に分割可
能となり、分割後の単繊維繊度が0.05〜0.5 デニールと
なる分割型複合短繊維を容易に得ることができる。
According to the present invention, it is not necessary to carry out a splitting treatment with an alkaline aqueous solution, an organic solvent or the like, and a splittable conjugate fiber which gives a woven or knitted fabric or a non-woven fabric having a very good texture, drapability and wiping property can be obtained. The reason is as follows. By adding polysiloxane to at least one of the components, a thin film of polysiloxane is formed between polyester and polyamide, the splitting property is improved, and splitting can be performed by a simple water stream treatment or the like. Further, by setting the amino terminal group of the polyamide to 35 mmol / g or less, the amount of monomers generated during spinning is reduced, and spinning operability is improved. Furthermore, by making the melt viscosity of the polyamide and polyester satisfy the formula and, it is possible to prevent the aggregation and deterioration of the operating condition at the center of each polymer, and to divide the polymer uniformly, and the single fiber fineness after the division is 0.05 to It is possible to easily obtain split type conjugate short fibers having a denier of 0.5.

【0021】[0021]

【実施例】次に、本発明を実施例によって具体的に説明
する。なお、測定法等は次のとおりである。 (1) 溶融粘度 島津製作所製のフローテスターFT−500 を用いて、280
℃において、剪断速度1000sec-1で測定した。 (2) アミノ末端基量 試料をフェノールとメタノールとの容量比7:3の混合
液に溶解し、自動滴定装置(HIRANUMA COM−900)を用い
て1/20規定塩酸で中和滴定して求めた。 (3) 分割率 処理後の不織布の断面を電子顕微鏡で観察し、次式で算
出した。 分割率(%)=(a/b)×100 a:セグメント数の約90%以上が分割した繊維の本数 b:分割前の繊維の本数
EXAMPLES Next, the present invention will be specifically described with reference to examples. The measuring method and the like are as follows. (1) Melt viscosity Using a flow tester FT-500 manufactured by Shimadzu Corporation,
It was measured at a shear rate of 1000 sec -1 at 0 ° C. (2) Amino end group amount The sample was dissolved in a mixture of phenol and methanol at a volume ratio of 7: 3, and neutralized and titrated with 1 / 20N hydrochloric acid using an automatic titrator (HIRANUMA COM-900). It was (3) Division Ratio The cross section of the non-woven fabric after the treatment was observed with an electron microscope and calculated by the following formula. Dividing ratio (%) = (a / b) x 100 a: Number of fibers divided by 90% or more of the number of segments b: Number of fibers before dividing

【0022】実施例1 アミノ末端基量30mmol/g、溶融粘度3200ポイズのナイ
ロン6をA成分とし、ポリシロキサン(ジメチルポリシ
ロキサン)を 0.5重量%含有した溶融粘度3000ポイズの
ポリエチレンテレフタレートをB成分として、体積比
1:1の割合で溶融紡糸し、1000m/分で巻き取り、図
1に示すような断面を有するセグメント数24、繊度10デ
ニールの分割型複合未延伸糸を得た。この未延伸糸を集
束して10万デニールの繊維束とし、延伸速度 100m/
分、延伸温度70℃で 2.4倍に延伸した。次いで定長熱処
理を行った後、クリンパーで18個/2.54cmの捲縮を付与
し、油剤を付与した。次いで 160℃の乾燥機中で弛緩率
15%で弛緩熱処理を10分間行い、繊維束を収縮させてた
後、トウカッターで51mmの長さに切断して短繊維を得
た。この短繊維をローラカードにより80g/分の速度で
開繊し、目付60g/m2のウエブとし、ロール巻にした。
このウエブをネットコンベアー上に供給し、孔径0.12m
m、孔間隔 1.0mmの噴射孔を複数個有する噴射ノズルを
3段階に設け、前段20kg/cm2 、中段60kg/cm2、後段8
0kg/cm2 の圧力の水を噴射して高圧水流噴射処理を行
い、ウエブの構成繊維の分割化と絡合化を行った。噴射
ノズルとネットコンベアの間隔は50mmで、ネットコンベ
アの速度は20m/分とした。得られた不織布の分割率は
98%であった。
Example 1 Nylon 6 having an amino terminal group content of 30 mmol / g and a melt viscosity of 3200 poise was used as the component A, and polyethylene terephthalate having a melt viscosity of 3000 poise containing 0.5% by weight of polysiloxane (dimethylpolysiloxane) was used as the component B. Melt spinning was performed at a volume ratio of 1: 1 and wound at 1000 m / min to obtain a split type composite undrawn yarn having 24 segments and a fineness of 10 denier and having a cross section as shown in FIG. The undrawn yarn is bundled into a fiber bundle of 100,000 denier, and the drawing speed is 100 m /
The film was stretched 2.4 times at a stretching temperature of 70 ° C. Then, after performing a fixed length heat treatment, crimps of 18 pieces / 2.54 cm were applied with a crimper, and an oil agent was applied. Then relax in a dryer at 160 ° C
Relaxation heat treatment was performed at 15% for 10 minutes to shrink the fiber bundle, and then cut to a length of 51 mm with a tow cutter to obtain short fibers. The short fibers were opened with a roller card at a speed of 80 g / min to form a web having a basis weight of 60 g / m 2 and wound into a roll.
This web is supplied on a net conveyor, and the hole diameter is 0.12m.
Injecting nozzles with m injection holes and 1.0 mm spacing are provided in 3 stages, 20kg / cm 2 in the first stage, 60kg / cm 2 in the middle stage, 8 in the second stage
Water having a pressure of 0 kg / cm 2 was sprayed to carry out a high-pressure water jet treatment to split and entangle the constituent fibers of the web. The distance between the injection nozzle and the net conveyor was 50 mm, and the speed of the net conveyor was 20 m / min. The division ratio of the obtained nonwoven fabric is
It was 98%.

【0023】実施例2〜7、比較例1〜3 ナイロン6のアミノ末端基量及び各成分のポリシロキサ
ンの添加量を表1のように変えた以外は実施例1と同様
に行って不織布を作成した。得られた結果も併せて表1
に示す。
Examples 2 to 7 and Comparative Examples 1 to 3 Nonwoven fabrics were prepared in the same manner as in Example 1 except that the amount of amino end groups of nylon 6 and the amount of polysiloxane added as each component were changed as shown in Table 1. Created. The obtained results are also shown in Table 1.
Shown in.

【0024】[0024]

【表1】 [Table 1]

【0025】実施例2〜7では、紡糸調子が良好で、糸
切れの発生が紡糸開始時から21時間以上であった。ま
た、得られた不織布は、ペーパーライクで、表面がソフ
トな風合いを有しており、分割率は92%以上であり、高
い分割性を示した。これに対して、比較例1では、アミ
ノ末端基量が多かったため、紡糸操業性が悪く、糸切れ
が紡糸開始時から16時間程度で発生し、その後も多発し
た。また、ポリシロキサンの含有量が少ない比較例2で
は、分割率が低く、ポリシロキサンの含有量が多い比較
例3では、ローラカードでの開繊時に分割が発生し、ネ
ップが多発した。
In Examples 2 to 7, the spinning condition was good, and the occurrence of yarn breakage was 21 hours or more from the start of spinning. The obtained non-woven fabric was paper-like, had a soft texture on the surface, and had a split ratio of 92% or more, showing high splittability. On the other hand, in Comparative Example 1, since the amount of amino terminal groups was large, the spinning operability was poor, and yarn breakage occurred about 16 hours after the start of spinning, and then occurred frequently. Further, in Comparative Example 2 in which the content of polysiloxane was low, the division ratio was low, and in Comparative Example 3 in which the content of polysiloxane was high, division occurred at the time of opening with the roller card, and many neps occurred.

【0026】実施例8〜11、比較例4〜8 ナイロン6とポリエチレンテレフタレートの溶融粘度関
係、セグメント数を表2のように変えた以外は実施例1
と同様に行って不織布を作成した。得られた結果も併せ
て表2に示す。
Examples 8 to 11 and Comparative Examples 4 to 8 Example 1 except that the relationship between the melt viscosity of nylon 6 and polyethylene terephthalate and the number of segments were changed as shown in Table 2.
A non-woven fabric was prepared in the same manner as above. The obtained results are also shown in Table 2.

【0027】[0027]

【表2】 [Table 2]

【0028】実施例8〜11で得られた分割型複合短繊維
を用いて作成した不織布は、分割後の平均繊度が0.21デ
ニール以下で、複合繊維の断面における2成分の中央部
での集結が小さく良好であったため、分割率が95%以上
であった。これに対して、ナイロンとポリエステルの溶
融粘度比が 0.8と小さい比較例4では、ナイロンが中央
で集結し、分割不可能であり、溶融粘度比が 1.3と大き
い比較例5では、ポリエステルが中央部で集結し、分割
不可能であると共に、紡糸開始から18時間で糸切れが発
生し、紡糸調子が不調であった。また、ナイロンの溶融
粘度が低い比較例6では、紡糸調子、分割率は良好であ
ったが、分割後の不織布の引裂強力が低い結果となり、
ナイロンの溶融粘度が高い比較例7では、紡糸開始から
4時間で糸切れが発生し、紡糸が不可能であった。さら
に、セグメント数の少ない比較例8では、分割後の単繊
維繊度を十分小さくすることができなかった。
Nonwoven fabrics prepared by using the splittable conjugate short fibers obtained in Examples 8 to 11 have an average fineness of 0.21 denier or less after splitting, and the two components in the cross section of the conjugate fiber are aggregated in the central portion. The split rate was 95% or more because it was small and good. On the other hand, in Comparative Example 4 in which the melt viscosity ratio of nylon and polyester is as small as 0.8, nylon is concentrated in the center and cannot be divided, and in Comparative Example 5 in which the melt viscosity ratio is as large as 1.3, the polyester is in the center portion. It was impossible to divide, and yarn breakage occurred 18 hours after the start of spinning, and the spinning condition was not good. Further, in Comparative Example 6 in which the melt viscosity of nylon was low, the spinning tone and the splitting ratio were good, but the result was that the nonwoven fabric after splitting had a low tear strength,
In Comparative Example 7 having a high melt viscosity of nylon, yarn breakage occurred 4 hours after the start of spinning, and spinning was impossible. Furthermore, in Comparative Example 8 having a small number of segments, the single fiber fineness after division could not be made sufficiently small.

【0029】[0029]

【発明の効果】本発明によれば、ポリアミドとポリエス
テルとからなる分割型複合繊維において、製糸性が良好
で、分割後の最終単繊維繊度も小さく、かつ織編物又は
シート状にする以前の延伸、カーディング、紡績等の工
程では分割せず、その後のウオータージェット加工やエ
ンボス加工等の機械的処理によって初めて高度に分割す
る織編物や不織布に好適な分割型複合短繊維の製造が可
能となる。
EFFECTS OF THE INVENTION According to the present invention, in a splittable conjugate fiber composed of polyamide and polyester, the spinnability is good, the final single fiber fineness after splitting is small, and stretched before forming a woven or knitted fabric or sheet. It is possible to manufacture split type short staple fibers suitable for woven and knitted fabrics and non-woven fabrics that are not divided in the processes such as carding and spinning, but are then highly divided for the first time by mechanical treatment such as water jet processing and embossing. .

【図面の簡単な説明】[Brief description of drawings]

【図1】分割型複合短繊維の一例を示す断面図であり、
セグメント数の合計が24の例を示す。
FIG. 1 is a cross-sectional view showing an example of a splittable conjugate short fiber,
An example in which the total number of segments is 24 is shown.

【符号の説明】[Explanation of symbols]

1 ポリアミドセグメント 2 ポリエステルセグメント 1 Polyamide segment 2 Polyester segment

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 D04H 1/04 Z 7199−3B // D01F 6/90 311 E 7199−3B 6/92 307 N 7199−3B ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location D04H 1/04 Z 7199-3B // D01F 6/90 311 E 7199-3B 6/92 307 N 7199 -3B

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 アミノ末端基量が35mmol/g以下のポリ
アミドAとポリエステルBとからなり、少なくとも一方
の成分がポリシロキサンを0.05〜1重量%含有し、下記
式及びを満足する2成分を用いて、ポリアミドセグ
メントとポリエステルセグメントとが、横断面において
放射状に合計10以上で交互に配列されてなる複合フィラ
メントを溶融紡糸し、延伸し、定長又は緊張熱処理し、
機械捲縮を付与し、さらに弛緩熱処理した後、所定長に
切断して短繊維とすることを特徴とする分割型複合短繊
維の製造方法。 1500≦〔A〕≦3500 1.0≦〔A〕/〔B〕≦1.2 ここで、〔A〕及び〔B〕は、それぞれポリアミドA及
びポリエステルBの溶融粘度(ポイズ)で、温度 280
℃、剪断速度 1000sec-1における値を示す。
1. A two-component composition comprising polyamide A and polyester B having an amino terminal group content of 35 mmol / g or less, at least one of which contains 0.05 to 1% by weight of polysiloxane and which satisfies the following formulas and The polyamide segment and the polyester segment are melt-spun of a composite filament in which a total of 10 or more are alternately arranged in a radial cross section, and the resulting composite filament is stretched, subjected to a constant length or tension heat treatment,
A method for producing splittable conjugate short fibers, which comprises applying mechanical crimping, further subjecting it to relaxation heat treatment, and cutting it into short fibers to give short fibers. 1500 ≦ [A] ≦ 3500 1.0 ≦ [A] / [B] ≦ 1.2 where [A] and [B] are melt viscosities (poises) of polyamide A and polyester B, respectively, and temperature 280
The values are shown at ℃ and a shear rate of 1000 sec -1 .
JP5300909A 1993-11-05 1993-11-05 Production of splittable conjugate short fiber Pending JPH07126922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5300909A JPH07126922A (en) 1993-11-05 1993-11-05 Production of splittable conjugate short fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5300909A JPH07126922A (en) 1993-11-05 1993-11-05 Production of splittable conjugate short fiber

Publications (1)

Publication Number Publication Date
JPH07126922A true JPH07126922A (en) 1995-05-16

Family

ID=17890591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5300909A Pending JPH07126922A (en) 1993-11-05 1993-11-05 Production of splittable conjugate short fiber

Country Status (1)

Country Link
JP (1) JPH07126922A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002103095A1 (en) * 2001-06-15 2002-12-27 Kuraray Co., Ltd. Composite fiber
KR100868745B1 (en) * 2005-03-09 2008-11-13 주식회사 코오롱 Method of manufacturing for wiping knit fabric with excellent antibiosis and clearing property
WO2019013004A1 (en) * 2017-07-13 2019-01-17 東レ株式会社 Core-in-sheath-type composite fiber intended to be shrunk and fibrillated, and woven or knitted fabric containing same
JPWO2017187843A1 (en) * 2016-04-28 2019-03-07 デンカ株式会社 Artificial hair fiber

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002103095A1 (en) * 2001-06-15 2002-12-27 Kuraray Co., Ltd. Composite fiber
US6811874B2 (en) 2001-06-15 2004-11-02 Kuraray Co., Ltd. Composite fiber
CN100347355C (en) * 2001-06-15 2007-11-07 可乐丽股份有限公司 Composite fiber
KR100868745B1 (en) * 2005-03-09 2008-11-13 주식회사 코오롱 Method of manufacturing for wiping knit fabric with excellent antibiosis and clearing property
JPWO2017187843A1 (en) * 2016-04-28 2019-03-07 デンカ株式会社 Artificial hair fiber
JP2022000552A (en) * 2016-04-28 2022-01-04 デンカ株式会社 Artificial hair fiber
WO2019013004A1 (en) * 2017-07-13 2019-01-17 東レ株式会社 Core-in-sheath-type composite fiber intended to be shrunk and fibrillated, and woven or knitted fabric containing same
JPWO2019013004A1 (en) * 2017-07-13 2020-04-16 東レ株式会社 Core-sheath composite fiber for shrink splitting and woven / knitted fabric containing the same

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